/*
 * Copyright 2009-2015 xinjunli (micromagic@sina.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package self.micromagic.grammer;

/**
 * 字符检查器接口.
 */
public interface Checker
{
	/**
	 * 对一个字符进行检查.
	 *
	 * @param pd  解析器数据.
	 * @return    如果检查结果为合法, 则返回true..
	 * @throws GrammerException     检查中发生语法错误.
	 */
	boolean verify(ParserData pd) throws GrammerException;

}